DC Power Supplies from 5KW-2MW

Solid State High Power DC Power Supplies

PCTI's high power DC power supplies are a solid state unit utilizing primary SCR (thyristor) technology in a full-bridge rectifier, constant voltage control, constant current control, automatic crossover series regulation, DC filter, instrumentation, and many operational and protective monitoring features. We manufacture military and industrial DC power supplies, rugged high power rectifiers, and custom DC power supplies in the highest power ranges. PCTI's High-Precision class of DC power supplies use an SCR preregulator to achieve high efficiency, low ripple, precise regulation and low output noise. Power supply designs are available in ratings from 5KW to 15MW with current ratings up to 120KVA.

For Your Application

PCTI's high power DC power supplies and systems can be used wherever DC power is required. Our rugged high power rectifiers are at work today in hundreds of industrial, commercial, research, transit and military applications including electrochemical, steel, welding, plating, circuit breaker testing, busbar testing, desalinization, grid tie in, and aircraft engine starting. Each unit is based on standard designs and precision engineered to meet your specific application. Our custom power supplies are available as regulated or non-regulated for a variety of industrial or laboratory environments. If you need help in specifying your power supply, request a quote online or download our dc power supply brochure.

Custom DC Power Supplies Designed for You

PCTI's high power DC power supplies are built to customer order from a range of standard power and control modules, and offer high performance, high reliability and sophisticated control systems. A variety of computer interfaces are available to meet all of your power supply programming and control requirements. Applications include electrochemical, steel, welding, plating, circuit breaker testing, busbar testing, desalinization, grid tie in, aircraft engine starting, and any low voltage power supplies, high current DC power supplies, industrial power supplies or military power supplies applications.

DC Power Supplies Ranges

PCTI's custom power supplies are offered across a wide power range. For more information, read about our 5KW-50KW DC power supplies, 50KW-100KW DC power supplies, 100KW-500KW DC power supplies, and 500KW-2MW DC power supplies.

Following are our standard specifications.

Contact us for options not listed here or for assistance regarding your particular application.

Voltage: +10%
• Single phase: 110, 115, 120, 130, 200, 208, 230
• Three phase: 208, 220, 230, 380, 415, 440, 460, 480, 575
Frequency: 50/60Hz
Power factor: better than 0.98 lagging from 10% to full load

Voltage range:
• Standard & precision: 6V - 1,000V
Amperage range:
• Standard: 50A - 200A
• Precision: 2A - 100A
Voltage regulation (line & load):
• Standard: 1%
• Precision: 0.05%
Current regulation (line & load):
• Standard: 1%
• Precision: 0.1%
Ripple VRMS (maximum):
• Standard: 1%
• Precision: 0.5%
Response time (typical):
• Standard: 200ms*
• Precision: 50ms*

*for load steps of 50 to 90% of full load

• Constant current control
• Constant voltage control
• Automatic crossover
• Regulated voltage
• Regulated current
• Soft start
• Automatic phase selection
• Built-in test (BIT)

NEMA/IP enclosure ratings:
• NEMA 12 (IP20)
• NEMA 3R (IP54)
• NEMA 4 (IP55)
• NEMA 4X (IP56)
• other ratings available upon request
Operating temperature:
• -5°C - 40°C
Storage temperature:
• -10°C - 65°C
• Up to 90% non-condensing

• Overcurrent/overload*
• Overvoltage*
• Undervoltage*
• Overtemperature (cabinet, semiconductor, transformer)
• Input short circuit (circuit breaker or fusing)
• Output short circuit*
• Input & output surge suppression (MOVs)
• Phase loss*
• I2t fusing

*via electronic circuitry

Computer interface:
• Ethernet/IP
• Modbus TCP
• CANbus,
• IEEE 488.2 / GPIB
• RS232
• RS485
• Start/stop
• Reset
• Fault
• Inhibit
• Current adjust
• Voltage adjust
• Fault indication (UV, OV, OC, other)
Analog signals:
• 4mA - 20mA
• 0V - 5V
• 0V - 10V

• Power on indicator
• Start/stop pushbutton
• Fault/reset pushbutton
• Voltage regulation potentiometer
• Current regulation potentiometer
• Analog DC voltmeter, 2% accuracy
• Analog DC Ammeter, 2% accuracy


• Increased performance
• One programmable chip with the functionality of conventional control components
• SCR preregulator to achieve high efficiency, low ripple, precise regulation, and low output noise
• Coarse and fine adjustments are available for both current and voltage
• Event and data logging to continuously monitor equipment operating status as well as internal control parameters

• Electronic phase imbalance
• Instrumentation/metering
• Paralleling
• 12, 18, or 24 pulse design
• Remote control station
• Input cables
• Output cables
• Mobile options (casters, pneumatic tires, towable, trailer- or rack-mounted, etc.)

• Forced air
• Direct water
• Closed loop water to water heat exchanger
• Heatpipe
• Natural convection
• Water-cooled
• Liquid-cooled
• Water system protection: low flow, temperature, resistivity, leak detection, low level